A structural protein is:

Correct answer: B. Collagen

  • A. Pepsin
  • B. Collagen
  • C. Haemoglobin
  • D. Immunoglobulin

Explanation

The correct answer is Collagen. Collagen is a structural protein, which means it provides support and strength to various body tissues, such as skin, bones, and connective tissues. In contrast, Pepsin, Haemoglobin, and Immunoglobulin are functional proteins. Pepsin is an enzyme involved in digestion, Haemoglobin transports oxygen in the blood, and Immunoglobulin plays a crucial role in the immune response.

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About Biological Molecules

The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.

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